California Water Service Group, through its subsidiaries, provides water utility and other related services in California, Washington, New Mexico, Hawaii, and Texas. The company is involved in the production, purchase, storage, treatment, testing, distribution, and sale of water for domestic, industrial, public, and irrigation uses, as well as for fire protection services. It offers its services to approximately 499,400 customer connections in 100 California communities; approximately 6,700 water and wastewater customer connections on the islands of Kauai, Maui, Oahu, and Hawaii; approximately 38,300 customer connections in the Tacoma, Olympia, Graham, Spanaway, Puyallup, Rainier, Yelm, and Gig Harbor areas; and approximately 11,500 water and wastewater customer connections in Rio Communities, Rio Del Oro, Meadow Lake, Indian Hills, Squaw Valley, Elephant Butte, Morningstar, Sandia Knolls, Juan Tomas, Monterey, and Cypress Gardens systems. The company also engages in the provision of non-regulated water-related services, including operating of municipally owned water systems, privately owned water, and recycled water distribution systems; water system operation, meter reading, and billing services to private companies and municipalities; leasing of communication antenna sites on its properties; and billing of optional third-party insurance programs to its residential customers. In addition, it provides wastewater collection and treatment services. California Water Service Group was founded in 1926 and is headquartered in San Jose, California.
Company profile updated October 11, 2026.
As of October 9, 2026. Daily closing data may differ from the live quote shown in the dashboard.
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